<template>
  <div class="list" ref="wrapper">
    <div>
     <div class="area">
       <div class="title border-topbottom">当前城市</div>
         <div class="button-list">
           <div class="button-wrapper">
             <div class="button">{{this.currentCity}}</div>
           </div>
         </div>
     </div>

     <div class="area">
       <div class="title border-topbottom">热门城市</div>
         <div class="button-list">
           <div class="button-wrapper" v-for="item of hot" :key="item.id"
             @click="handleCityClick(item.name)">
             <div class="button">{{item.name}}</div>
           </div>
         </div>

     </div>

     <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div class="item border-bottom" v-for="inneritem of item" :key="inneritem.id"
               @click="handleCityClick(inneritem.name)">
              {{inneritem.name}}
            </div>
          </div>

     </div>
   </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      /** this.$store.dispatch('changeCity', city) **/
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow hidden
    position absolute
    top 1.58rem
    left 0
    right 0
    bottom 0
    .title
      line-height .54rem
      background #eee
      padding-left .2rem
      color #666
      font-size .26rem
    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width 32.33%
        .button
         margin :.1rem
         padding .1rem 0
         text-align center
         border .02rem solid #ccc
         border-radius .06rem
    .item-list
      .item
       line-height .76rem
       color #666
       padding-left .2rem
</style>
